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TroubleshootingEasy

External monitor not detected

Get your second screen showing up again.

5 min 5 stepsUpdated 2026-06-26
Overview

Most monitor issues are cable-related. Start there before touching settings.

Common symptoms
  • Monitor shows 'No signal'
  • Only one screen shows up
  • Wrong resolution

Step-by-step fix

Step 1 of 520%
Step 1 of 5
1

Reseat the cable

Unplug the HDMI or USB-C cable at both ends and plug back in firmly.

About 1 min
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